Intelligent, rule-based portfolio strategies for investors
Contributor's Links: Logical Invest

Remove uncertainty about your investment strategy decisions and get superior returns with greater safety. Our quantitative portfolio strategies are delivered as a few simple ETF trades per year that you easily place in your own brokerage accounts.

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S&P 500 Powers To New Record
For the third time in three months, the Federal Reserve lowered its key interest rate by a quarter percentage point. Stocks advanced in the wake of the Fed’s policy decision, with the S&P 500 index hitting a record of $3,046.
The Retreat Of The Safe Heavens
September proved to be a mean-reverting month for Treasuries and Gold. Following last month’s +11% and+8% moves respectively, Treasuries corrected by -2.6% while Gold retreated -3.3%.
Beyond Tariffs: Tech Cold War And Hardplay?
There was a new escalation to the US-China relations that crosses beyond tariffs which one may argue is a negotiating tactic or a populist political card. Plus an update on European Elections, Bitcoin, dececntralized finance, and more.
Recovery Priced In
We are now in a situation where the S&P500 has completely reversed last year’s correction and has a year-to-date performance of +18 %. The question is, can the index continue higher?
Thank You. Fed (Again)
Federal Reserve announced that it will leave its benchmark rate unchanged at 2.25% to 2.50%, also indicating that no rate hikes would be likely this year. This is a substantial change in stance.
Inverse Volatility Trading – A Smart Investment Strategy For Income
Since 2011, trading inverse volatility has been the one of the most rewarding investment strategy in the markets with annual returns well above 30%, depending on the instruments used.





Latest Posts
Update Of Our Asset Allocation Models
Update of our tactical asset allocation models, 10 of them added recently and are free for all our followers
Updated Overview Of Our Asset Allocation Models
With the launch of our new app we've been asked by several followers to provide an overview of the asset allocation models we currently publish. Several of them are free upon registration, so check it out!
Portfolio Builder: How To Create A Portfolio Of Portfolios
We’ve received a couple of reader questions in the last few weeks asking whether it is possible to create a “Portfolio of Portfolios” in our Portfolio Builder.
Logical Invest 2.0: Strategy & Launch Of New Application
Logical Invest launches new web application

Work Experience

Founder & Partner
January 2013 - Present (7 years 3 months) develops intelligent rule based portfolio investment strategies. These strategies are offered on a subscription basis to the public through
Colour-Science AG
June 2002 - Present (18 years)
- Development of the i2e (intelligent image enhancement) technology - Red eye removal - Image noise removal - Image processing - Quality monitoring software - ICC profiling


Eidgenössische Technische Hochschule Zürich
1988 / 1989
Master of Business Administration
Ecole polytechnique fédérale de Lausanne
1983 / 1988
Microtechnics, Robotics


The Logical-Invest Rotation Strategy Blog
Frank Grossman
Logical Invest started out as a place to join Frank Grossmann’s popular Global Growth Strategies and now has grown to include a team of researchers, strategy developers and successful investors. We share a passion for logical, rules based investing and a willingness to share our learning with others.